Stroh



PRIN'ZFIITG MACHINE.

Np'. 577,584. Pateted Feb. 23, 1897.

8 Sheets--Sheet 2.

(No Model.)

W. M. ROCKSTROH.

PRINTING MACHINE. l

'Patented Feb. 23, 1897.l

ITO. 577,584

(No Model s sheets-sheen 3,

W. M. ROCKSTROI-I. PRINTING MACHINE.

No.' 577,584. Patented PGN 2s, v1897.

8 Sheets-Sheet 4 (No Model.)

`W. M. ROGKSTROH.

PRINTING MACHINE.

8 Sheets-Sheet 5,

W. M. ROCKSTROH.

(No Model.)

PRINTING MACHINE. A

Patented Feb. 23, 1897.

me mams ve-rzns no vnovouwo. wasnwomu, u. c

(No Model.) `8 Sheets-Sheet; 6.

W. M. ROGKSTROH. PRINTINGMCHINE.

- f am, 15am/Own WM f Mm 8 Sheets-Sheet 7 (No Model.)

W. M. ROCKSTROH.

PRINTING MACHINE.

,584. Patented Peb. 2s, 1897.

(No Modeln) Y 8 Sheets-Sheet 8.

W. M."ROCKSTROH.

PRINTING MACHINE.

No. 577,584. Patentedeb. 23, 1897(` llNrrEn STATES A PATENT @Eric-E.

" WILHELM MAX RocKs'rRoi-I, oF PLAUEN, GERMANY.

`PRINTING-IVIACl-.HNE

SPECIFICATION forming part of Letters Patent No. 577,584, dated February23, 1897. Application filed February 14,1896. Serial No. 579,267. (Nomodel.)

To @ZZ whom t may. concern.-

Beit known that I, WILHELM MAX ROCK- STROH, mechanical engineer, of No.l2 Grenzstrasse, Plauen, near DresdemGerman y, have inventeda new anduseful Improvement in Printing-Machines,`of which the following is aspecilication. i

It is of essential importance in printingmachiues that the adjustment ofthe parts that coperatein the formation of the impression should be mostexact and correct and that this eXact adjustment should not be injuredby the yielding or springing of the said parts. The parts chieflyconcerned are the cylinder and the bed, for the relative adjustment ofwhich the bearings of the cylinder have been made adjustable, the bedbeing made unadjustable also, a bed-adjusting arrangement has beencombined with the cylinder-ad j ustin g arrangement.

According to the present invention there are combined in aprinting-machine arrangements which enable the lnostexact and correctmutual adjustment of the working parts to be effected in a very simplemanner, and also secure that these parts shall be 1n utually unyieldingand unalterable. By this means not only are speed and certainty ofaction secured to an extraordinary extent in the operation of themachine, but the exactness and beauty of the printing is increased to animportant degree. The object desired is attained,accordin g to this invention,hy the combination of a cylindercarried by stationary hearings,and consequently uuadjustable, a form-bed with form adjustable parallelto itself and consequently to the cylinder, and a considerably-increasedsu pport for the reciprocating form in its longitudinal and lateraldirections, with lateral guiding devices for preventing deviations ofmovement on the part of the box carrying the form. As is well known, theadjustment of the cylinder in its two bearings to its proper positionrelatively to the form has hitherto been one of the most important tasksof the foreman or other person in charge of the machine, as on thisadjustment depends the exact working of the machine. The accuracy ofthis adjustment depends, however, on the skill of the said foreman orother person, and rests very often more on experiment than on the safermanipulation of mechanism provided for the purpose. Any inaccuracy inthe adjustment is immediately visible in the printing and willnecessitate correction. To obviate these oloinder whatever over thewhole width thereof,

it is provided internally with a number of arms or cross-shaped frames,which are displaced relatively to one another, and also witli=helicalribs that cross one another, so that a rigid cylinder-surface isproduced that will not yield at any point.

As a further consequence of the mounting of the cylinder in stationarybearings any necessity for altering the diameter of the cylinder byincreasing the thickness of the blanket thereon, as heretofore usual, isavoided, so that the position of the cylinder and its peripheral speedremain constant. The mounting of the cylinder in stationary bearingsalso possesses the substantial advantage that, on account of itsunalteralole position as regards height, there is always the same depthof engagement of its toothed ring with the racks that rotate it, andwhich are located on the form-carrying box, which always remains at thesame height. There is thus avoided the irregularity in the gearing thatis always a consequence of any alteration of the height of the cylinder.

The bed carrying the form used in combination with a cylinder mounted instationary bearings, as described, rests by means of ribs, which arewedge-shaped in the longitudinal direction, on a frame which is providedwith corresponding wedges and is situate so as to be capable of slidingon the form-box mounted on the carriage. The adjustable bed is preventedfrom shifting horizontally and can only loe raised i and lowered. Thesliding frame is provided with a screw that is capable of being rotatedby an adjusting-wheel, but which cannot move endwise relatively to theframe and which engages in a nut fixed to the aforesaid form-carryingboX. By this arrangement the form can be shifted parallel to itself inaccordance with the divisions of a scale, so that it can be adjusted inheight,

IOO

and consequently in relation to the periphery of the cylinder, with theutmost accuracy, certainty, and quickness. The points of support of thebed may be as numerous as desired in the direction of. the breadth ofthe bed. It is desirable that the bed should be supported in such amanner that the supporting or shifting places should be directlyabovethe supporting or bearing lines formed by the rows of carriage-wheels,which are arranged one behind another below the aforesaid box.

In printing-machines as heretofore constructed there has been arranged atrack or traveling way on which the carriage, with its two rows ofwheels, runs after the manner of railway-vehicles. The support of theform was in this arrangement of the machine restricted in thelongitudinal' direction to the necessary distance apart o f thecarriage-axles, that is, to the wheel-base,and in the direction of itsbreadth to the bread th of the single track provided. This is, however,recognized as inadequate. The arrangement is supplemented in a machineaccording to this invention by a second traveling way or t-rack, wherebythe support of the form in the direction of the width of the machine isincreased fourfold, while an important closing up or contraction of thesupporting-lines in the longitudinal direction of the machine iseffected by the distribution or displacement between the wheels of thefirst traveling way of the wheels that roll on the second traveling way.In addition to this very much increased support of the form provision ismade against its shifting laterally and upwardly by means of a prismaticguidance of the boX, there being arranged for this purpose at the sidesof the box outwardly and downwardly inclined surfaces located betweenadjustable rollers.

By the combined arrangement hereinbefore set forth a stiffening, whichextends from the base-frame upward, is produced, due to the increase ofthe number and the decrease of the distance apart of the axles in thelongitudinal direction of the machine, to the increase of the number andthe displacement relatively to one another of the wheels in thedirection of the width of the machine, to the mounting on thesemultiplied supportingpoints of the form-foundation and the supportingthereon ofthe ferm, and to the mounting of the cylinder, which is itselfstift'encd, in stationary bearings. Between these sev eral parts onlythe bed with the form is capable of being very slightly adjusted asregards height, with its firm support nevertheless maintained, the bedand form being secured against any lateral deviation and any improperupward motion by the prismaticroller guidance of the box.

The accompanying drawings represent a printing-machine constructedaccording to this invention.

Figure l is a side elevation of the machine with the foundation box, theadjustable wed ge-f rame mounted thereon, and the formbed resting on theWedge-frame, in section. Fig. 2 is a cross-section on the line a: ai ofFig. 1. Fig. 3 shows the arrangement of the carriage-wheels in plan.Fig. et is a view of the printing-cylinder, half in elevation and halfin section. Fig. 4 is an end view of the cylinder to a smaller scale,showing the means employed for strengthening it. Fig. 5 is a side viewof the inking apparatus. Fig. 6 is a transverse sectional view of thesame. Fig. 7 is an end view of the cylinder, showing the gripperarrangement and blanket-clamping attachment. Fig. S represents a frontview of the cylinder corresponding with Fig. '7, partly in section.

From the bed ct of the machine rises the side frames b b', carryingiiXed bearings in which the cylinder c is mounted to rotate. On the beda there are formed or arranged four ways ct d2 d3 di. On the outer waysd d4 run the wheels of the axles e e2 es, and on the inner ones-viz., d2cl3-the wheels of the axles f f2. Vith one of the latter axles thereengages the driving-rod f, by means of which the carriage comprising theframe f* and the wheels and axles connected thereto are caused to moveto and fro, The inner wheels are so arranged with regard to the outerones that there are only the smallest practicable distances between thewheel-axles e j" e2 f2 e3, while there are at the same time only shortdistances between the places where support is afforded in the breadth ofthe form by the four rows of wheels. All the wheels are provided withrings of teeth in gear with racks fixed to the bed a. and to theform-carryingbox Ct. This box a', which bears on the carriage below, asshown, is provided over each row of wheels with longitudinal rails orways g' g2 g3 g4, on which wedges t/ h2 h3 h4, which are connectedtogether to form a frame lt, Fig. l, rest and can slide, while on thesewedges rest the oppositely-arranged wed ges t" t2 t3 t4 of the bed lt,which carries the form. (Not shown.)

The frame 72, is provided with an adjustingscrew l, which is so mountedthat it can be rotated, but cannot move endwise relatively to the frame,and which enters a nut m, fixed on the box a', the arrangement beingsuch that by rotating the screw, by means of the handwheel thereon, theframe h can be screwed in or out, whercbythe bed k and with it the formresting thereon can be accurately, easily, securely, and quicklybrought, in accordance with a suitable scale, to the desired position asregards height in relation to the cylinder c. The box a has at n 'nldownwardly and outwardly inclined surfaces, against which rollers 0 o,which are adjustable in the machine-frame, lie and form a prismaticguide, which prevents the box from moving laterally or rising.

The cylinder c, Figs. 4t and 4ta, is provided internally with cross-armsc c2 c3, which are displaced relatively to one another, and with helicalstrengthening-ribs c4 and c5, which cross each other, as shown.

The endeavor to reduce the adjustment of the machine to the smallestamount and to the least number of adjusting devices is completed by adisengaging arrangement which is provided for the purposev of removingthe inking-rollers and distributing-rollers from the ink-transferringcylinder represented in side elevation in Fig. 5 and in cross-sectionalelevation in Fig. 6 and by a gripper arrangement and blanketclampingarrangement represented in end view in Fig. '7 and in side elevation,partly in section, in Fig. 8. The left and right hand portions of Fig. 6are sections on the lines zz and z' a', respectively, of Fig. 5.

It is important that boththe inking-rollers p p', which transfer the inkto the form, and also the distributing4rollers q q', to which the ink istransferred from the ink-box, should be capable of being moved away fromthe large ink-cylinder r, that lies between these pairs of rollers, whenthe machine is to stand still for any length of time, for theresting-lines formed between the past rollers and the iron cylinder whenthe machine is allowed to rest for a time are injurious to goodcontact-surfaces. whole of the rollers from the cylinder r to beeffected quickly and easily by the rotation of a single part, thefollowing arrangement is provided: On a shaft s', on which is a lever s,there are arranged two eccentrics s2 s3, the

straps of which are connected by links s4 and links 35 s6, that formtoggles with the bearings 37 S8 of the inking-rollers p p', whichbearings are located in horizontal sliding ways. By turning over thelever Sthe links S5 s6 are raised and push the bearings S7 S8 away fromeach other in opposition to the pressure of springs 39, which, whenengagement is to be effected by the turning back of the lever s, carrythe bearings with the rollers back into the working position. Likewise,by turning the lever s, eccentrics t2, also iixed on the shafts s', arerotated, and the rods t3 t of said eccentrics are caused to raise leverst3* if and cause bolts t5 t6 to press with their heads against the endsof the adj usting screws of the bearings tl t8 of the rollers q q' andthereby so raise the bearings that the rubbing-rollers q q' are liftedoff the cylinder r. The bearings t7 t8 can also slide back underspring-pressure into their working positions upon the lever s beingturned back. There is provided for the said rollers 9' and C a bearin Tarrangement which is shown in the right-hand side of Fig. 6 andaccording to which the bearings .S8 and t8 consist of bolts u, that arecapable of being slid back and are provided with bearingboxes and whichcan be pushed back against springepressure into cases to enable the endsof the roller-axles to be readily removed from the bearings. p

The grippers and clamping-in arrangement for the blanket on th'ecylinder (shown in end view in Fig. 7 and in longitudial view To enablethis moving away of the' in Fig. 8) are to be considered as essentialauxiliaries in this printing-machine for preventing the machine foremanfrom neglecting the machine.

As to the grippers it is well known that the machine foreman has oftento adj ust the grippers, which is done by striking them so Ias to makethem act correctly and all grip each sheet of paper exactly when thesame is fed thereto. Now any adjustment is obviated by the gripperarrangement now to be described, an essential feature of which is thatthe axis of rotation of the gripper-bar is arranged as near as possibleto the periphery of the cylinder, and each gripper is independentlyrotatably mounted, the end of the gripper that projects backwardly withregard to this axis of rotation being subject to springpressure in orderalways to press the fore end of the gripper down upon the cylinder, soas to secure a proper grip.

In the recess in the periphery of the cylinder shown in Fig. 7 there isarranged, with its pivots c as far out as possible, the bar fu, thatcarries the grippers o2 and which extends from end to end of thecylinder. The periodical rotation of this bar for operating the grippersc2 takes place in a known manner through the action of cam -surfaces andspring-pressure, the grippers o2 being rotatably mounted in smallbrackets c3 on the bar 0. Each gripper has, as usual, a long free endfor gripping the sheet. Itis, however, lengthened backward in the formof an arm n* beyond the axis of rotation on the bracket o3,

and this end is subject to the pressure of a spring @4 provided underit. From this arrangement it follows that the gripper, besidespossessing the ordinary motion for seizing a sheet, (which movement whenthe drag-bar is moved acts as near as possible to the periphery of thecylinder in such a manner that the gripper never moves the sheet, butalways comes down upon it from above,) acts under all circumstances withadditional gripping by reason of the spring-pressure and thus requiresno further help or adjustment by the machine foreman. In the aforesaidrecess of the cylinder c are also situated the clamping devices for theblanket, which, since the cylinder is constructed and mounted ashereinbefore described and subject to no displacement in height and veryseldom requires enlarging, will generally only require to be single. Theclamping arrangement is a double one, one part being for the ordinaryblanket and the other for the covering oil-sheet.

The face of the stationary jaw w is formed IOO IIC

with a groove w', in which can engage the n semicylindrical rib @u2 ofthe jaw w3, which moved away from the jaw w far enough to permit theintroduction of the end of the blanket between the said jaws, afterwhich on releasing the jaw w3 the spring will close it upon the blanketand effect the clamping of the latter. The jaw w3 has also a groove w inits back, in which engages the rib w7of a jaw au", which works on apivot w10 and is subject to thepressure of a spring w8. The rib w7clamps fast the end of the oil-sheet inserted in the hollow channel w.In this way the insertion of the blanket is greatly facilitated and thesecure holding thereof insured. The tightening up of the blankets uponthe surface of the cylinder is effected on the opposite side of thecylinder by means of the ordinary round bars u u2, provided with checkaction.

The above-mentioned move ment of the jaw w3 to permit the introductionof the blanket may be effected by prying back the said jaw with asuitable instrument inserted between it and the jaw w at their endswhich project beyond the edges of the blanket or by the pressmanapplying his hands to the arms w3* through openings in the ends of thecylinder. The corresponding movement of the jaw wf to permit theintroduction of the oil-sheet is to be effected by prying it back fromthe jaw w3 in the same way as described with reference to the movementof the latter.

. What I claim as my invention isl. In a printing-machine, thecombination of a printing-cylinder and stationary bearings therefor, areciprocating form-box and prismatic guides therefor whereby it isprevented both from rising and from moving sidewise, a form-bedadjustable in said box toward and from the cylinder in parallel relationto itself and to the cylinder, means substantially as described foreffecting such adjustment, a carriage for such form-box, a fixedfoundation and three or more fixed supporting-ways for said carriage,wheels under said carriage for running on the several ways, the axles ofsaid wheels rolling on the different ways being arranged as near aspracticable to each other and those on each way being arranged betweenthoseron the next way so that the form is supported in the direction ofits length and breadth at many places by the foundation and thecarriage, substantially as herein set forth.

2. The combination of a form-box, a carriage for said form-box, three ormore fixed ways for said carriage, wheels for said carriage running onsaid fixed ways those wheels on -each'way being arranged between thoseon the next way, and an impression-cylinder having internal helicalstrengthening-ribs crossing each other, all substantially as hereindescribed.

3. The combination with a printing-machine cylinder, of a rotatablegripper-bar o pivoted to the cylinder near the periphery thereof,brackets o3 on the said bar, grippers U2 independently pivoted to saidbar and prolonged backward beyond their pivots, and springs applied tothe backward prolongations of the several grippers for pressing themupon the sheet, substantially as herein described.

4. The combination with a printing-inachine cylinder, ofblanket-clamping devices consisting of a fixed jaw and a spring-pressedpivoted jaw provided with a groove and a rib that engage with each otherfor receiving the blanket ends, and a spring-pressed clampingjaw pivotedto the back of the rst-named pivoted jaw and engaging therewith bygrooves and ribs for receiving the ends of the oiled sheet, allsubstantially as herein described.

5. In a prin ting-machine of the kind herein described wherein thedistributing-rollers which are in rolling contact with the largeinkcylinder when the machine is in use, the combination with the saidrollers of separate movable bearings therefor, springs applied to saidbearings to press the several rollers toward the said cylinder, a levercommon to all of said bearings and mechanism substantially as hereindescribed intermediate of said lever and bearings for withdrawing theseveral rollers at one time from contact with the cylinder, as hereindescribed.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

VILHELM MAX ROCKSTROH.

Witnesses:

MARTIN KRNER, WILHELM WIESENHTTER.

